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UNITED STATES PATENT OFFI E CHRISTOPHER F. REBSTOCK, OF MERIDEN,CONNECTICUT.

COMPOSITION FOR COATING METALLIC SURFACES.

SPECIFICATION forming part Of Letters Patent NO 280,864, dated July 10,1883.

i Application filed December 1 4, 1882. No specimensl To all whom it mayconcern:

Be it known that I, CHRISTOPHER F. REB- STOCK, a citizen of the UnitedStates, residing at Meriden, in the county of New Haven and State ofConnecticut, have invented certain new and useful' Improvements inComposition for Coating Metallic Surfaces, of which the following is aspecification.

This invention relates to a composition of a gelatinous character andsuitably colored, as-

hereinafter described and claimed, for coating metallic surfaces. 1 i

The object of my invention is to produce lacquers of variable degrees oftransparency or shades of color for coating brass and similar metals, soas to produce a finish thereon and prevent the rusting of the materialso coated. To this end I combine together the following ingredients,viz: turmeric, Spanish saffron, catechu, cochineal, sandalwood, andgelatine,

and place the same in a definite quantity of boiling water, the quantityof water depending uponthe quantity of material under treatment and thedegree of transparency or shade the lacquer is to assume, and then boilthe mixture until the volume of water has been reduced to a third of itsoriginal bulk.

Aformula that will be found very useful is as follows: Take of turmeric,three ounces; Spanish saffron, three ounces; catechu, four ounces;cochineal, four ounces; sandal wood, two ounces; and gelatine, sixounces. Place these ingredients in three gallons of boiling water andboil until one gallon only of liquor remains. Then pour said liquor off,and the lacquer is ready for use in the various ways in which lacquer isused.

While I have above indicated the proportions in which the severalingredients may be combined to produce a good serviceable lac quer,still I do not confine myself to such specific quantities, as thequantity of either one or more of the several ingredients may be changedor modified within suchlimits as not to change catechu, cochineal,sandalwood, gelatine, and

water, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

CHRISTOPHER F. REBSTOCK. Witnesses:

J. H. SMITH, O. D. ROGERS.

